Heat accumulative roller bottom heating furnace

Abstract

The invention relates to a heat accumulative roller bottom heating furnace, which belongs to the technical field of steel rolling equipment. Through the application of the heat accumulative combustion technology, the heating quality of steel blanks is improved, and the coal gas consumption is reduced. The invention has the technical scheme that the heat accumulative roller bottom heating furnace comprises a furnace body, a furnace hearth and heat accumulative burner nozzles, wherein the heat accumulative roller bottom heating furnace comprises a plurality of heat accumulative burner nozzles which are uniformly distributed on the upper layers of both sides of the furnace in the furnace length direction, coal gas spray openings and air spray openings are arranged in the heat accumulative burner nozzles, the coal gas spray openings are distributed in the center of the heat accumulative burner nozzles, the air spray openings are uniformly distributed in the peripheral direction of the coal gas spray openings, each heat accumulative burner nozzle is respectively connected with an air pipeline, a coal gas pipeline and a flue gas pipeline. The invention has the advantages that the heat accumulative burner nozzles adopt the concentric jet flow method, and the air and the coal gas after the heat accumulation meet in the furnace at a fixed angle after being sprayed out, so the flame length can be ensured. Heat accumulation cambers are horizontally and fully embedded in the furnace wall, so the heat supply capability of each heat accumulation chamber is enlarged. Compared with a conventional heat accumulative heating furnace, the heating furnace using the technology of the invention saves one fifth of coal gas consumption on the premise of the same yield.

Description

technical field [0001] The invention relates to a regenerative roller bottom heating furnace used in a thin slab continuous casting and rolling production line, belonging to the technical field of rolling equipment. Background technique [0002] In the thin slab continuous casting and rolling production process, the roller hearth heating furnace plays a very important role. It not only heats the thin slab produced by the continuous casting machine, but also stores high-temperature slabs. The temperature of the slabs is from 800 to 1050°C. Heating to 1150±10°C, the heated slab remains in the roller hearth furnace to be rolled, so that two different production processes of continuous casting and rolling mill production can be connected together by means of the roller hearth furnace, and the thin slab continuous casting and continuous production can be fully utilized. Therefore, the length of the roller hearth furnace is generally 200-300 meters, of which only the furnace lengt...

AI Technical Summary

Problems solved by technology

However, the inner width of the roller hearth furnace is only 2 meters. If the common regenerative combustion technology is adopted, it will appear that the fuel and air discharged from the I burner have not been completely combusted in the heating furnace, and will be burned by the opposite II burner. Inhalation, so that secondary combustion occurs in the II burner, and in a small space, due to sufficient air and gas, secondary combustion occurs, and its combustion temperature will reach above 1400 ° C, resulting in various unpredictable consequences. If it is mild, there will be overheating in the burner, and if it is severe, it will melt the heat storage body and burn out the furnace wall, etc.

In addition, the regenerative combustion equipment is complex and bulky. Relatively speaking, ordinary regenerative burners cannot be installed and used on roller hearth furnaces with relatively simple structures.

[0005] Since the regenerative combustion technology of the prior art cannot be directly applied to the roller hearth heating furnace, how to re-develop the regenerative technology according to the characteristics of the roller hearth heating furnace, so that the regenerative technology can be used in the roller hearth heating furnace It is a new task for technicians to apply on the Internet

Images